Does anyone have documentation on how to change a rear speed sensor in an 1999 Audi A4 2.8 Quattro?

My ABS light is on and my ABS is not working. This occurred right after I had my right wheel baring replaced.

 

I don't recall exactly, but it is connected behind the rotor and also underneath the rear seat bench. If you know what the speed sensor looks like then you will recognize it when you see it. Then trace it to its point underneath the reat seat. It isn't too bad a job. GL! I think you can download the bentley manual for free and I am sure it will have a diagram